From 0e2dea9a393718482162035f4022a1285d30b2a1 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 11 Jul 2008 19:23:49 +0000
Subject: [PATCH] From Liang Aibin, "  In lastest svn version of OSG, the .ive
 plugin missing osg::Light, it does not process I/O for osg::Light. Now I have
 fixed it as follows:

2. In DataInputStream.cpp, I add support code in DataInputStream::readStateAttribute
    for osg::Light.

3. In DataOutputStream.cpp, I add support code in DataOutputStream::writeStateAttribute
    for osg::Light.
 "
---
 src/osgPlugins/ive/DataInputStream.cpp  | 5 +++++
 src/osgPlugins/ive/DataOutputStream.cpp | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/src/osgPlugins/ive/DataInputStream.cpp b/src/osgPlugins/ive/DataInputStream.cpp
index ed92bbc69..9fbdc6aac 100644
--- a/src/osgPlugins/ive/DataInputStream.cpp
+++ b/src/osgPlugins/ive/DataInputStream.cpp
@@ -53,6 +53,7 @@
 #include "PointSprite.h"
 #include "Multisample.h"
 #include "Fog.h"
+#include "Light.h"
 
 
 #include "Group.h"
@@ -1193,6 +1194,10 @@ osg::StateAttribute* DataInputStream::readStateAttribute()
     else if(attributeID == IVEFOG){
         attribute = new osg::Fog();
         ((ive::Fog*)(attribute))->read(this);
+    }
+    else if(attributeID == IVELIGHT){
+        attribute = new osg::Light();
+        ((ive::Light*)(attribute))->read(this);
     }    
     else{
         throw Exception("Unknown StateAttribute in StateSet::read()");
diff --git a/src/osgPlugins/ive/DataOutputStream.cpp b/src/osgPlugins/ive/DataOutputStream.cpp
index a5c585634..ea04e2c77 100644
--- a/src/osgPlugins/ive/DataOutputStream.cpp
+++ b/src/osgPlugins/ive/DataOutputStream.cpp
@@ -56,6 +56,7 @@
 #include "PointSprite.h"
 #include "Multisample.h"
 #include "Fog.h"
+#include "Light.h"
 
 #include "Group.h"
 #include "MatrixTransform.h"
@@ -835,6 +836,10 @@ void DataOutputStream::writeStateAttribute(const osg::StateAttribute* attribute)
         else if(dynamic_cast<const osg::Fog*>(attribute)){
             ((ive::Fog*)(attribute))->write(this);
         }
+        // This is a Light
+        else if(dynamic_cast<const osg::Light*>(attribute)){
+            ((ive::Light*)(attribute))->write(this);
+        }
 
         else{
             std::string className = attribute->className();